Method of rolling profile iron with parallel flanges.



W. VASSEN. METHOD OF ROLLING PROFILE IBON WITH PARALLEL FLANGES AIiPLIOATIOR FILED H1344, 1912 Patented July 29, 1M3- W U n I Q 47 a turn are as PATENT enrich.

'WJELHELM VASSEN, F MCHEN-FOEST, GERMANY.

METHOD OF ROLLING PROFILE IRON WITH IARALLEL FLANGES.

Ltltlhhht.

To all uieom it may concern:

Be it known that I, WILHELM VassnN, a subyect of the Emperor of Germany, and re siding at Stumpergasse 4:2, Aachen-Forest, Z'IGermany, have invented acertarn new and useful Method of Rolling Profile Iron with Parallel Flanges, of which the following is a specification.

This invention relates to a method of rolL' must be proportional to the stability of the 'material to be rolled just as is customary in connection with universal rolling mills for flat iron bars.

According to the present method the flanges are given a slight curvature during the preliminary rolling, so that the rolls for I Z treating the flange edges can press with considerabe pressure thereon without fear of any unintentional. bending taking place, whereby the edges, which were previously rounded, are now flattened, while the flanges may also be shortened, if necessary.

l'n the drawings, F'gures l, 2, 3, and 4 illustrate the shape of the several sets of rolls "through which the bar to he rolled passes.

. Fig. l of the drawings shows the shape of the rollers of a four roll ill through which a blank consisting of a lock of rec- I tangular cross section is passed and is thereby given a cross section in which the flanges are inclined to each other at an acute angle While they are at the same time bent. The

lrolling faces a and b of the horizontahrollers A and B are concave in profile, while the rolling faces 0 and d of the vertical rolls C and l) are convex in profile, so that the flanges are bent in the manner clearly shown in the drawing. 7

Fig. 2 shows the following set of rolls which are arranged in the same way as the previous except that the pass is of such a shape as to increase the angle between the flanges, the cin-vaturc of the flanges being, of coursq, retained.

Specification of Letters Patent.

,glpplz'oation tiled February 3.4., 1912. Gerial lilo. 67?,559.

Patented July 129, 1913.

v Fig. 3 shows the rolls for treatin the edges of the flanges. These rolls consist of a central part c and side extehsions f and g, the rolling faces hof the part c bemg'concave so as to correspond to the curvature of the flan es. The parts f are-provided with rolling aces [c which are approximately at right angles to the flanges and have a width equal to the maximum desired thickness of flange, while the parts 9 are provided'with faces at which rojectbeyond the parts f and are inclined at an acute angleto the flanges. Owing to the curvature of .the flanges, considerable pressure y be ex erted thereon, so that their rounce'd edges are flattened, while the parts 9 prevent any slipping ,orbending of the flanges when the pressure is excessive, and, at the same time, serve as a guide for the bar. It is also possible by this method to make the flanges,

narrower by exerting a very heavy pressure on the edges, the peculiar construction of the rolls preventing anybending.

Fig. 4 represents the finishing rolls, consisting of horizontal cylindrical rolls n and vertical cylindrical rolls p. In this set off bar finished. The general construction and arrangement of these rolls and the means for adjustment may be'the same as is described in the specification of my prior Letters Patent referred to above. I

Having now described my invention what I claim as new and desire to secure by Let ter Patent is i 1. In a method of rolling profile iron with parallel flanges passing a blank consisting of a block 0 rectangular cross section through a set of four rolls in which the rolls the flanges are straightened and the r block is given a cross section with flanges inclined to each other at an acute angle and slightly bent, passing the be thiough a second similar seto-f rolls in which the flanges are flattened'out to form an obtuse angle, the curvature of the flanges being re- I tained, operating with heavy pressure upon the edges of the bent flanges in a set of two rolls, and straightening out the flanges and finishing the bar in a set of tour rolls with cylindrical surfaces.

2. In. a rolling mill for rolling profile iron with parallel flanges, a set of tour rolls comprising a pair of horizontal rolls having concave rolling faces, and a pair of vertical rolls having convex rolling faces, Y

3. In a; rolling mill for rolling profileiron ing beyond each undereuls rolling face and with parallel flanges, a set'of two rolls each inclined at an acute angle to the flanges. .3 comprising a central portion having con- In testimony whereof I afiix my signature cave rolling faces, undercut rolling faces in presence of two Witnesses.

projecting from each side of said central VVILHELM VASSEN. portion for operating upon the flange edges Witnesses:

and arranged approximately at right angles HENRY (Immune,

to said flanges, and a guiding face pro-ject- ELISE KOELBUSCH. 

